VC下自制多媒体播放器，实现基本功能，即可以实现音乐的播放、暂停、停止； 为播放器添加一个播放列表框； 实现上一曲、下一曲的功能-VC under the the homemade multimedia player, basic functions, that can achieve the music play, pause, stop played for the player to add a list box achieve on a next one' s func